GCN Circular 5922
E. Berger (Carnegie Observatories) reports on behalf of a larger collaboration: "Inspection of our Gemini/GMOS images (GCN #5912) at the positions of XRT sources S1 and S2 (GCN #5921) reveal the presence of several extended optical sources, one of which may be the host galaxy of GRB 061210. Within the error circle of source S1 we detect a single extended object with r=24.8+/-0.2 mag (S1-G1). Similarly, within the error circle of source S2 we detect an extended object with r=24.8+/-0.2 mag (S2-G1), as well as a brighter galaxy with a bulge-dominated morphology on the edge of the error circle with r=21.0+/-0.02 mag (S2-G2), and a third galaxy about 1.5" outside of the error circle with r=22.9+/-0.05 mag (S2-G3). All magnitudes are derived using the zeropoint available on the GMOS website. We note that the elliptical object EO1509-0232011 mentioned in GCN 5921 is not visible in our images (or in DSS2) and it is likely to be a high proper motion star. In the absence of X-ray or optical variability it is unclear which (if any) of these galaxies is the host of GRB 061210. However, if source S2 is shown to be the X-ray afterglow, the most likely host galaxy is S2-G2 given its brightness and consistent location with the XRT error circle."